Mailing : Businesses all across the country spend millions of dollars each day advertising their offerings. They may succeed in gaining new customers and make a small profit for doing so. Without a plan to retain new customers, though, advertising costs will continue to eat up a large portion of the businesses revenue. A mailing list provides a direct line of communication to your customers. It helps to maintain "top of mind" awareness, which simply means that your customer's think of you when they need whatever it is you provide. It also gives you an opportunity to announce special promotions and incentives to customers that have already shown a willingness to buy from you.